Patent US2638663A successfully refreshed from Google Patents.
US2638663A
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Method of making turbine blades
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1948-10-23
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Granted: 1953-05-19
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Expires: 1968-10-23
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Bartlett
- 👤 Nicholas J Connavino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:47
CPC Classifications
B; B21; B21J; B21J5/00; B21J5/06; B21J5/08; B21K; B21K3/00; B21K3/04; F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/147; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1430399A
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US883889A
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US1947347A
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US1891612A
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US2063706A
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US2355413A
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US2412615A
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US2473245A
Cited
US2503630A
Cited
US2459850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |